Shared boat & shuttle transfers from Ilha Grande to the Rio (GIG) airport depart daily from the main Abraão pier. There is a meeting point close to the pier where you will be escorted to a speed boat that takes you across to the Brazil mainland. Here you change for a van which will drive around 2 hours north and you will be dropped off at the departure level of the Rio de Janeiro Galeao (GIG) airport, also known as the Tom Jobim Airport.
You can also get from Ilha Grande to the Rio airport by private vehicle. First, you take a shared boat to the mainland where your private car or van will be waiting to take you to the GIG airport. See below for more information about the 2 types of transfers.